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    On non-standard models for number theory
    In Bar-Hillel, Yehoshua & [From Old Catalog] (eds.), Essays on the Foundations of Mathematics, Magnes Press. pp. 259--268. 1961.
  •  138
    Graham Oppy. Philosophical perspectives on infinity
    Philosophia Mathematica 15 (3): 397-399. 2007.
    The author tells us that this book was originally intended to be part of a larger work, with the provisional title God and Infinity, but that he opted instead for a separate and independent treatment of the notion of infinity in philosophy and related areas. The original purpose is very well-hidden, showing itself clearly only in the Preface and a few other places. The book begins with a chapter describing some known alleged difficulties having to do with the infinitely large and infinitely smal…Read more